Allowance for Doubtful Accounts - Schedule of Allowance Aging Analysis (Details) $ in Millions	Oct. 31, 2016 USD ($)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance Receivables, Current	$ 1,647
30-90 days past due	37
Total finance receivables	1,698
Retail Portfolio [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance Receivables, Current	449
30-90 days past due	37
Total finance receivables	499
Wholesale Portfolio [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance Receivables, Current	1,198
30-90 days past due	0
Total finance receivables	1,199
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Over 90 days past due	14
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Retail Portfolio [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Over 90 days past due	13
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Wholesale Portfolio [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Over 90 days past due	$ 1